Daily shower. I cycle daily and I can't cycle slowly, and I'm sweating. So, need a shower. Another shower after gym, and another shower before bed.
Bath not so often. Hot bath just in the Winter after a whole day outdoors, or when feeling a cold coming up.
In the army there was this guy who didn't take a shower. After a week the guys in his room dragged him into the bathroom, and used the broom and cold water to scrub him down.